20
TROUBLESHOOTING GUIDE
2. LOW OUTPUT
symptom
probable cause
remedy
flameout when speedup
the smoke is thin,
carburetor spout backward
fuel filter obstruct,
fall short of fuel
muffler fouled with oily
deposits
clean fuel filter
、
clean fuel
road
、
adjust carburetor
clean the oily deposits
compress press is shortage
piston
、
piston ring
、
cylinder attrite
、
replace piston
、
piston ring
engine leak
Conjoint surface of the
Cylinder and crank cast leak
repair
the end of two crank shaft leak the seal is bad
replace seal
engine overheats
burning room fouled with
oily deposits
avoid use it for long time
、
high speed and heavy load
clean the oily deposits
3. ENGINE RUNNING UNSTABLE
symptom
probable cause
remedy
there are metal knock sound
piston
、
piston ring
、
cylinder attrite
、
piston pin
、
piston attrite
bearing of crank shaft attrite
replace piston
、
piston ring
replace piston pin
、
piston
replace bearing
there are metal knock sound
engine overheats
burning room fouled with
oily deposits
gasoline branded is unfit
avoid use it for long time
、
high speed and heavy load
clean the oily deposits
replace require branded octane
engine ignition break off
there is water in fuel
spark gap is wrong
coil gap is wrong
instead fuel
adjust spark gap 0.6-0.7mm
adjust coil gap 0.3-0.4mm
4. THE ENGINE SUDDENLY STOPPED
probable cause
remedy
fuel is use up
spark plug fouled with oily deposits and short
circuit
high voltage wire fall off
add fuel
clean the oily deposits
connect
